Microwave oven for uniform heating

Abstract

A uniform heating structure for a microwave oven is provided. The structure of the invention includes: a magnetron for generating microwaves, a wave guide for guiding the microwaves generated by the magnetron, a pair of openings for radiating the microwaves guided by the wave guide in the form of circular polarized waves, and a cavity which is shaped in a polyhedron more than a rectangular and in which more than one interior walls constructing the polyhedron slope at a predetermined angle (θ1) excepting a right angle with respect to a neighboring interior wall. With this structure, the microwaves generated by the magnetron are reflected to be delivered to food through a sloping interior wall of the cavity while being radiated to the cavity through the wave guide and the openings, thus ensuring a uniform distribution of the microwaves throughout the food and making the food uniformly cooked.

What is claimed is:  
     
       1. A microwave oven for uniform heating comprising: 
       a magnetron for generating microwaves;  
       a wave guide for guiding the microwaves generated by the magnetron;  
       a pair of openings for radiating the microwaves guided by the wave guide in the form of circular polarized waves; and  
       a cavity having the configuration of a polyhedron and in which two or more interior walls of which the polyhedron is comprised slope at a non-right angle with respect to an adjacent interior wall,  
       wherein an interior surface of the interior wall of the cavity opposite to that on which the wave guide and openings are installed slopes in a direction in which food is placed, and said pair of openings being formed on the surface of a sloping interior wall of the cavity.  
     
     
       2. The microwave oven according to  claim 1 , wherein said wave guide and said openings are set at an angle to the horizontal on an interior wall. 
     
     
       3. The microwave oven according to  claim 1 , wherein one half to one third of said interior walls slope in the direction in which food is placed.